48. You extract RNA from liver cells and then carry out an agarose gel electrophoresis of the liver RNA. The RNA fragments are then transferred to an RNA-binding membrane (nitrocellulose or nylon) using capillary action. Next, you hybridize a probe for gene X to the RNA on the membrane. Which of the following statements regarding your experiment is true? (A) You are trying to determine how many copies of Gene X are in liver cells. (B) You are trying to determine if Gene X is expressed in liver cells. (C) You are trying to determine if the Gene X protein is present in liver cells. (D) You are trying to determine the chromosomal location of Gene X. (E) You are trying to determine whether Gene X has a mutant sequence.